Bell & Gossett 113021 Model No. 87, 3/4 x 1/2 in Nominal

Bell & Gossett 113021 Model No. 87, 1/2 in (Female) & 3/4 in (Male) Automatic Air Vent, 3/4 x 1/2 in Nominal, FNPT x MNPT, 150 psi, 240 deg F, Brass Body, 2-1/4 in W x 4-3/4 in H